Update clang-tidy expected output for newer versions

Newer clang-tidy versions (15+) include line numbers and formatting
bars in error output:
  Old: 'int main(){...}'
  New: '    2 | int main(){...}'
       '      |          ^'

Updated expected output format in integration tests to match.

Author: pocc

tests/test_hooks.py

@@ -125,8 +125,8 @@ def generate_clang_tidy_tests(cls):
         additional_args = [[], ["-fix"], ["--fix-errors"], ["--", "-std=c18"]]
         clang_tidy_args_sets = [ct_base_args + arg for arg in additional_args]
         clang_tidy_err_str = """{0}:2:18: error: non-void function 'main' should return a value [clang-diagnostic-return-type]
-int main(){{int i;return;}}
-                 ^
+    2 | int main(){{int i;return;}}
+      |                  ^
 1 error generated.
 Error while processing {0}.
 """  # noqa: E501